Problem embedding html code

Hi, I would like to embed an interactive widget (created with the data visualization software Tableau) in my WordPress website, but it seems that when I paste the html code in the Text editor, WordPress cuts some parts of the code.

I believe that there are some restrictions to the free version of WordPress. My question is: there is a get around to this?! And if not, what do I need to do (or buy) in order to get it to work correctly?